Modelling pillow with cloth simulation model floating
Sure, for the newbies like me having the same issues having the model falling or floating when trying to use the clothing modifier/physics don't use a force field. If you have watched the tutorials on Youtube they always say to insert a force field in the middle of the model that has the clothing physics but in 2.8 you don't have to. I don't know if its the same case with 2.79b. Maybe I was doing it wrong but in 2.8 you only have to play around with the clothing physics settings and values. I tried without the forcefield and my model doesn't move anymore LOL. So the only settings I enable and play around are STIFFNESS and SHAPE.



I enable the SEWING option so my model gets sewn in the middle. The magic happens underneath STIFFNESS. I don't really know exactly how it works but changing these values will make the object you are trying to model have different forms. I can't give exact numbers because it always gives a different form when you change the values. The settings I play around the most are TENSION, COMPRESSION and BENDING.You can play around with SHEAR but for me changing the value to a lower or higher number will cause my model to like implode or something. BUT you have to keep TENSION and COMPRESSION to closer values or it will cause the same thing as SHEAR does. Like I said I was playing with these values so I don't know if Im right lol

These values that you input will go hand to hand with the subdivisions applied on the object. So playing around with subdivisions and the settings will give you different forms. IF you think the results of the form of your model looks boring you can always edit some of the faces by dragging the points with PROPORTIONAL SCALING with SMOOTH enabled. 

Here are the cushions I modeled:



After applying the clothing modifier I use PROPORTIONAL EDITING with SMOOTHING to get closer to the shape I wanted. Maybe you guys can use the same thing. I'm pretty sure experienced people might know an easier way... Sculpting is a good option but I wanted to  learn how to use the clothing physics.

The only thing I would say is play around and have fun. You never know what you might discover. I hope this is helpful to someone out there and if you recommend another way please let me know!